ubuntu@starbuck:~$ sudo perf stat -e 
unaligned_ld_spec,unaligned_st_spec,unaligned_ldst_spec,mem_access_rd,mem_access_wr,armv8_pmuv3_0/mem_access/
  stress-ng -c 2 -i 1 -m 1 --vm-bytes 128M -t 10s
stress-ng: info:  [4212] dispatching hogs: 2 cpu, 1 io, 1 vm
stress-ng: info:  [4212] successful run completed in 10.02s

 Performance counter stats for 'stress-ng -c 2 -i 1 -m 1 --vm-bytes 128M
-t 10s':

           3846782      unaligned_ld_spec                                       
    
           6641633      unaligned_st_spec                                       
    
          10488415      unaligned_ldst_spec                                     
    
       10332730839      mem_access_rd                                           
    
        8017909227      mem_access_wr                                           
    
       18350639845      armv8_pmuv3_0/mem_access/                               
    

      10.083796005 seconds time elapsed

ubuntu@starbuck:~$

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https://bugs.launchpad.net/bugs/1796904

Title:
  [Bionic] Update ThunderX2 implementation defined pmu core events

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